In-Reply-To: <[EMAIL PROTECTED]>
Thanks for all the comments. I have now looked at what Herb Schaaf had to
say in his QLToday series (and particular the comment by Steve Cooke on
the aspect ratio) and also reread all the manuals I have. The best result
I have so far is that, if the window is WxH pixels and the SCALE is
100,0,0, then the x-axis runs from 0 to 74*(W/H). But tests with LINE 0,0
TO 74*(W/H),100 do not quite produce a diagonal line except where the
window is the whole screen.
Has anyone, who is willing to say, actually looked in some ROM code? Or
will an author of QDOS,Minerva,SMSQ or what have you please let me know
the precise algorithm used. Why do I want this? To draw using
LBLOB,WBLOB,LINE,CIRCLE and ARC coherently (i.e. using the same base of
floating point coordinates) in one window.
Christopher Cave
